Rainbow Snakehead (Channa bleheri) Care Guide
Channa bleheri is a colourful dwarf snakehead endemic to the Brahmaputra basin of northeastern India, a predator best suited to advanced keepers.
Compiled by Aquairi from published sources · Published · Updated
Overview
Channa bleheri, the rainbow snakehead, is a dwarf snakehead of the family Channidae. FishBase lists a maximum of about 14.4 cm total length, while Wikipedia cites up to 17 cm standard length. It is among the most colourful snakeheads: juveniles around one centimetre are yellow, and adults bear large orange or red spots. The species is an obligate air-breather.
Taxonomy
- Family: Channidae
- Genus: Channa
- Scientific name: Channa bleheri
- Common synonyms: Bleher's snakehead
Habitat
Endemic to the Brahmaputra River basin in the Indian states of Assam and Arunachal Pradesh, with a type locality at Dibrugarh. It is a benthopelagic freshwater fish that mostly dwells near the bottom.
Tank requirements
- Minimum tank volume: 250 L
- Temperature: 22-26 °C (72-79 °F)
- pH: 6.5-7.5
- GH: 5-15 °dGH
- Tightly fitting lid required (escape-prone)
- Lifespan: 8-12 years
Diet
A carnivore: FishBase places the species at a trophic level of about 3.6. In aquaria it should be offered meaty foods such as earthworms, prawn and suitable frozen items; wean specimens onto non-live prepared foods where possible.
Compatibility
A predatory, semi-aggressive species generally kept singly or as a conspecific pair in a species tank. Avoid smaller fish that may be eaten and long-finned tankmates. A tight-fitting lid is essential as snakeheads are accomplished jumpers.
Breeding
Wikipedia notes that among dwarf snakeheads C. bleheri is unusual in being a nest-brooder rather than a mouthbrooder. Females initiate courtship and males select nesting sites, with both parents guarding the larvae.
Conservation status
IUCN Red List: Near Threatened (assessed 2010).
Channa bleheri Breeding Guide
Overview
Channa bleheri is a small Assamese snakehead that has been bred regularly in aquaria. Although the knowledge-base record labels it a mouthbrooder, the documented mode is biparental free spawning: no bubble nest is built and several thousand eggs simply float at the surface, with both male and female remaining to defend the eggs and fry. In nature the species occupies areas with a tropical monsoon climate and constructs burrows close to tree stumps in forest that is temporarily inundated during the annual monsoons.
Sexing
Females tend to grow larger and are deeper-bodied than males, especially when gravid. This difference becomes the most reliable visual cue as the fish mature.
Conditioning
The species is an obligate predator. Young specimens accept chironomid larvae, small earthworms and chopped prawn, while adults take strips of fish flesh, whole prawns, mussels, live river shrimp and larger earthworms. Mammalian and avian meat and feeder fish should be avoided. Seasonal variation matters: in cooler periods feeding decreases and water levels naturally fluctuate, which can be mimicked to bring stock into condition.
Breeding Setup
- Temperature: 14-28 C
- pH: 6.0-8.0
- Hardness: 36-357 ppm
- Low flow with surface cover so the floating eggs are not dispersed
Spawning Behavior & Trigger
During courtship the pair embrace in a manner similar to anabantoids. After spawning, the buoyant eggs float at the surface and both parents actively defend the clutch and the resulting fry.
Egg & Fry Care
Because the eggs float and are guarded by both parents at the surface, the pair can be left to tend the brood. Rearing follows the standard predatory-fry pattern, with small live foods offered once the young are free-swimming. Specific brood-size and incubation-time figures are not documented in the consulted source and are therefore omitted.
Common Challenges
As with most snakeheads, a settled, well-matched pair is the precondition for success, and the species is regarded as advanced. Maintaining stable conditions and a tightly covered tank is essential, since Channa bleheri is a capable jumper.